Display screen or portion thereof with a graphical user interface for displaying agricultural data



The FIGURE is a front view of a display screen or portion thereof with a graphical user interface for displaying agricultural data in accordance with the claimed design.

The outermost broken lines in the FIGURE show a display screen or portion thereof, and form no part of the claimed design.

The other broken lines in the FIGURE show portions of the graphical user interface, and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a graphical user interface for displaying agricultural data, as shown and described. 